CN101898117B - Filter medium, preparation method thereof, filter element, water purifying plant and water dispenser - Google Patents
Filter medium, preparation method thereof, filter element, water purifying plant and water dispenser Download PDFInfo
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- CN101898117B CN101898117B CN 200910138698 CN200910138698A CN101898117B CN 101898117 B CN101898117 B CN 101898117B CN 200910138698 CN200910138698 CN 200910138698 CN 200910138698 A CN200910138698 A CN 200910138698A CN 101898117 B CN101898117 B CN 101898117B
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Abstract
The invention discloses a preparation method of a filter medium for removing methyl tertiary butyl ether in water, comprising the following steps: a) mixing raw materials containing ultra-high molecular weight polyethylene (PE), activated carbon, 10X-type molecular sieve powder and pore forming agent at the following weight ratio: 220-400 parts of the ultra-high molecular weight PE, 100-120 parts of the activated carbon, 80-120 parts of the 10X-type molecular sieve powder and 90-120 parts of the pore forming agent; and b) pressing, sintering and cooling the mixture obtained in step a) in a die. The invention also discloses a filter medium prepared by the preparation method, a filter element utilizing same, a water purifying plant and a water dispenser. Compared with the prior art, the invention has the advantages that the proposed technical scheme can remove the methyl tertiary butyl ether in water, and the removal rate is above 96%, so that water quality is improved. The method is simple, the raw materials for preparing filter medium have wide resources and low cost.
Description
Technical field
The present invention relates to a kind of filter medium of removing methyl tertiary butyl ether(MTBE) in the water and preparation method thereof, use filter core, the water purifying plant and drinking Fountains of this filter medium.
Background technology
Industry and developing rapidly of agricultural cause water resource to be seriously damaged, industrial wastewater discharge is in rivers, lake, agricultural chemicals, agrochemical be the wantonly discharging of use and house refuse and sanitary wastewater in a large number, the water quality variation that these all cause underground water and surface water causes producing in the water a lot of harmful materials.Water pollutes more and more becomes the Tough questions that affects people's life.
The structural formula of methyl tertiary butyl ether(MTBE) is as follows:
Methyl tertbutyl referred to as MTBE.People touch methyl tertiary butyl ether(MTBE) by contaminated drinking water, have potential hazard.The fat-soluble characteristic of methyl tertiary butyl ether(MTBE) enters after the organism it, can accumulate at fat and kidney, can be by blood-brain barrier and placenta, and neurotoxicity and genetoxic can't neglect.
In recent years, in surface water and groundwater, frequently detect methyl tertiary butyl ether(MTBE).In the U.S., it is more serious to the pollution of air to the damage ratio of drinking water for MTBE, just can feel its existence by the sense of taste when people drink.Some investigation shows, per 8 wells have at least one to be polluted by methyl tertiary butyl ether(MTBE) in the city, more serious is, methyl tertiary butyl ether(MTBE) remains in the down-hole can form lasting harm, even in a very long time after banning use of methyl tertiary butyl ether(MTBE), it still can remain in continues harm in the water source, methyl tertiary butyl ether(MTBE) is degraded in ground water regime and does not threaten human health, needs the time in 10 years.
The method of removing the middle methyl tertiary butyl ether(MTBE) that anhydrates has: the methods such as deep oxidation, biodegradation and distillation.These methods are to the removal inefficiency of methyl tertiary butyl ether(MTBE) in the water.Also there is not at present a kind of preparation method can prepare fine removal effect to methyl tertiary butyl ether(MTBE) filter medium.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method of the filter medium for removing the water methyl tertiary butyl ether(MTBE), and when the filter medium that utilizes this preparation method to prepare was used for removing the methyl tertiary butyl ether(MTBE) of water, clearance was high.
In order to solve above technical problem, the present invention adopts following technical scheme:
A kind of preparation method of the filter medium for removing the water methyl tertiary butyl ether(MTBE) comprises the steps:
The raw material that a) will comprise ultra-high molecular weight polyethylene, active carbon, 10X type molecular sieve powder and gas generation agent mixes, and the weight ratio of ultra-high molecular weight polyethylene, active carbon, 10X type molecular sieve powder and gas generation agent is: 220～400: 100～120: 80～120: 90～120;
B) with step a) mixture of gained in mould, suppress, sintering, the cooling.
Preferably, the weight ratio of described ultra-high molecular weight polyethylene, active carbon, 10X type molecular sieve powder and gas generation agent is: 300～320: 110～120: 80～90: 100～110.The inventor finds, the weight ratio of described ultra-high molecular weight polyethylene, active carbon, 10X type molecular sieve powder and gas generation agent is in this scope the time, and the filter medium of preparation is significantly improved to the clearance of methyl tertiary butyl ether(MTBE).
Described ultra-high molecular weight polyethylene is weight average molecular weight greater than 1,000,000 polyethylene, and preferably using weight average molecular weight is 250～4,000,000 polyethylene.Ultra-high molecular weight polyethylene can obtain from domestic production producer, and the product of M-I (molecular weight is 150 ± 500,000), M-II (molecular weight is 250 ± 500,000), M-III (molecular weight is 350 ± 500,000), M-IV (molecular weight is greater than 4,000,000) equal-specification can be provided such as Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be.An effect of ultra-high molecular weight polyethylene is bonding and the effect that forms the filter medium skeleton, utilizes in addition ultra-high molecular weight polyethylene to pass through compacting, and the filter medium that sintering obtains forms micropore easily, can play the effect of methyl tertiary butyl ether(MTBE) in the adsorbed water.The particle diameter of ultra-high molecular weight polyethylene is 89～104 microns.
Active carbon is a kind of porous material, and it has such as cellular pore structure, huge specific area, special surface functional group, stable physics and chemistry performance, is good adsorbent, catalyst or catalyst carrier.Can be divided into wood activated charcoal according to raw material sources different activities charcoal, such as cocoanut active charcoal, apricot shell active carbon, wooden burgy etc.; The mineral raw material active carbon is the active carbon that raw material is made such as various coals and oil and elaboration products thereof; The active carbon that other raw material is made, the active carbon of making such as scrap rubber, waste plastics etc.Wherein the active carbon intensity take the coconut husk material as the source is higher, absorption property is better.The specific area of preferred active carbon is not less than 500 meters squared per gram, more preferably is not less than 1000 meters squared per gram.
Impurity, the especially medical activated carbon of active carbon in can efficient adsorption water, as the product by the relevant drug surveilance standard of country, impurity content is lower, and surface area is larger, and adsorption effect is also better.Select medical activated carbon can guarantee that filter medium is directly used in the processing of drinking water.In addition, the employing particle diameter is 74～89 microns medical activated carbon, and effect can be better.
Molecular sieve is a kind of silicate compound with cubic lattice structure, mainly connects to form spacious skeleton structure by sial by oxo bridge, and uniform duct, a lot of apertures and marshalling, hole that internal surface area is very large are arranged in structure.Contain in addition electricity price lower and metal ion that ionic radius is larger and the water of chemical combination attitude.Because hydrone loses in being subjected to thermal process continuously, but crystal framework structure is constant, formed the identical cavity of many sizes, cavity is linked to each other by the identical micropore of many diameters again, these small void diameter sizes evenly, can be than the inside of the little Molecular Adsorption of channel diameter to the hole, and than the large molecular repulsion in duct outside, thereby can come the different molecule of shape diameter, the different different molecular separation of molecule, degree of saturation of molecule, boiling point that polarity degree is different, namely has the effect of " screening " molecule, so be called molecular sieve.Molecular sieve has powerful absorption and crown_interception for methyl tertiary butyl ether(MTBE) in the water.
Molecular sieve model commonly used has:
A type: potassium A (3A), sodium A (4A), calcium A (5A);
X-type: calcium X (10X), sodium X (13X);
Y type: sodium Y, calcium Y.
Preferably, the particle diameter of 10X type molecular sieve powder is 44～74 microns.
Gas generation agent is selected at least a in Celogen Az, food-grade carbonic hydroammonium, the oxalic acid.As preferably, gas generation agent is Celogen Az or food-grade carbonic hydroammonium.Wherein, food-grade carbonic hydroammonium also claims AMMONIUM BICARBONATE FOOD GRADE, distinguishes with technical grade carbonic hydroammonium.Although technical grade carbonic hydroammonium also has the effect of sending out the hole, it may contain the impurity of insalubrity, should not be as the raw materials for production of Drinking Water Filtration medium.Gas generation agent is that a class is easily decomposed a large amount of gases of generation and caused a material of sending out the hole effect, and wherein azo compound, sodium acid carbonate, carbonic hydroammonium, ammonium carbonate, sulphonyl nitrile compounds, oxalic acid etc. are its typical representatives.
Pressing pressure can be chosen as 0.4～1.0MPa, and sintering temperature is: 220～230 ℃, sintering time is 120～150 minutes, and being cooled to 40～60 ℃ namely can the demoulding.
Although the present invention for step among the above-mentioned preparation method a) in used several raw materials carried out comparatively detailed description, the present invention is not limited to this kind theory or other any theory.Still can not determine for the concrete chemical change between them, the variation of structure in preparation process.The filter medium that these several raw materials are prepared through above-mentioned PROCESS FOR TREATMENT can effectively be removed the methyl tertiary butyl ether(MTBE) in the water, and synergy is arranged, and the methyl tertiary butyl ether(MTBE) in the water fully can be absorbed.
In the present invention, for blend step, can think that any low shear mixer or agitator that can significantly not change diameter of particle and size distribution all is suitable for, such as the agitator with blunt impeller blade, drum-type blender, spiral agitator etc., rotating speed will be decided on the type of blender, but is advisable with the dust of avoiding kicking up.
Mixed powder is filled in the pre-designed mould, and with its compacting, pressure generally is not more than 1MPa by pressurization, and adapts with the material of mould therefor; Mould can be by aluminium, cast iron, steel or any suitable material manufacturing that can bear relevant pressure and temperature.Can be in the mould inner surface release agent application, that can select silicone oil or any other can be adsorbed onto commercially available releasing agent on the filter medium hardly, also can use the processing release papers such as aluminium foil.
The present invention also provides following technical scheme: a kind of filter core that uses above-mentioned filter medium.
The present invention also provides following technical scheme: a kind of purifier comprises above-mentioned filter medium or filter core.
The present invention also provides a kind of water dispenser that comprises above-mentioned purifier.
With respect to prior art, the invention has the advantages that the technical scheme that proposes can remove the methyl tertiary butyl ether(MTBE) in the water, clearance reaches more than 96%, thereby reach the purpose of improving water quality, and method is simple, and the raw material sources of preparation filter medium are extensive, and cost is low.
Technical scheme provided by the present invention is specially adapted to the processing of the water that polluted by methyl tertiary butyl ether(MTBE).
The specific embodiment
For further understanding the present invention, below in conjunction with embodiment above-mentioned technical scheme is further elaborated and illustrates.
Embodiment 1
The concrete steps of present embodiment may further comprise the steps:
(1) takes by weighing ultra-high molecular weight polyethylene powder 220g, described ultra-high molecular weight polyethylene is the M-III type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 3,500,000, particle diameter is 89～104 microns, utilizes 140 orders and 170 purpose sieves to screen and namely can obtain 89～104 microns ultra-high molecular weight polyethylene powder;
(2) take by weighing medicinal active powdered carbon 100g, the particle diameter of described medical activated carbon is 74～89 microns, utilizes 170 orders and 200 purpose sieves to screen and namely can obtain 74～89 microns medicinal active powdered carbon;
(3) take by weighing 10X type molecular sieve 120g, the particle diameter of described 10X type molecular sieve is 44～74 microns, utilizes 200 orders and 325 purpose sieves to screen the 10X type molecular sieve that namely can obtain 44～74 microns;
(4) take by weighing food-grade carbonic hydroammonium 120g, purity reaches more than 99.99%;
(5) above-mentioned four kinds of powder are put into the mechanical agitator stirring mixed in 10 minutes;
(6) being packed into diameter is in the 50mm tubular die, suppresses under the hydraulic pressure of 0.6MPa, and sintering is 150 minutes under 220 ℃ of temperature;
(7) naturally cool to 50 ℃ of then demouldings, namely get the tubulose filter core of many minute apertures.
Embodiment 2
The concrete steps of present embodiment may further comprise the steps:
(1) takes by weighing ultra-high molecular weight polyethylene powder 400g, described ultra-high molecular weight polyethylene is the M-II type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 2,500,000, particle diameter is 89～104 microns, utilizes 140 orders and 170 purpose sieves to screen and namely can obtain 89～104 microns ultra-high molecular weight polyethylene powder;
(2) take by weighing medicinal active powdered carbon 120g, the particle diameter of described medical activated carbon is 74～89 microns, utilizes 170 orders and 200 purpose sieves to screen and namely can obtain 74～89 microns medicinal active powdered carbon;
(3) take by weighing 10X type molecular sieve 80g, the particle diameter of described 10X type molecular sieve is 44～74 microns, utilizes 200 orders and 325 purpose sieves to screen the 10X type molecular sieve that namely can obtain 44～74 microns;
(4) take by weighing Celogen Az 90g, purity reaches more than 99.99%;
(5) above-mentioned four kinds of powder are put into the mechanical agitator stirring mixed in 8 minutes;
(6) being packed into diameter is in the 50mm tubular die, suppresses under the hydraulic pressure of 0.75MPa, and sintering is 120 minutes under 230 ℃ of temperature;
(7) naturally cool to 50 ℃ of then demouldings, namely get the tubulose filter core of many minute apertures.
Embodiment 3
The concrete steps of present embodiment may further comprise the steps:
(1) takes by weighing ultra-high molecular weight polyethylene powder 300g, described ultra-high molecular weight polyethylene is the M-II type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 2,500,000, particle diameter is 89～104 microns, utilizes 140 orders and 170 purpose sieves to screen and namely can obtain 89～104 microns ultra-high molecular weight polyethylene powder;
(2) take by weighing medicinal active powdered carbon 110g, the particle diameter of described medical activated carbon is 74～89 microns, utilizes 170 orders and 200 purpose sieves to screen and namely can obtain 74～89 microns medicinal active powdered carbon;
(3) take by weighing 10X type molecular sieve 80g, the particle diameter of described 10X type molecular sieve is 44～74 microns, utilizes 200 orders and 325 purpose sieves to screen the 10X type molecular sieve that namely can obtain 44～74 microns;
(4) take by weighing oxalic acid 110g, purity reaches more than 99.99%;
(5) above-mentioned four kinds of powder are put into the mechanical agitator stirring mixed in 8 minutes;
(6) being packed into diameter is in the 50mm tubular die, suppresses under the hydraulic pressure of 0.75MPa, and sintering is 120 minutes under 220 ℃ of temperature;
(7) naturally cool to 50 ℃ of then demouldings, namely get the tubulose filter core of many minute apertures.
Embodiment 4
The concrete steps of present embodiment may further comprise the steps:
(1) takes by weighing ultra-high molecular weight polyethylene powder 320g, described ultra-high molecular weight polyethylene is the M-II type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 2,500,000, particle diameter is 89～104 microns, utilizes 140 orders and 170 purpose sieves to screen and namely can obtain 89～104 microns ultra-high molecular weight polyethylene powder;
(2) take by weighing medicinal active powdered carbon 120g, the particle diameter of described medical activated carbon is 74～89 microns, utilizes 170 orders and 200 purpose sieves to screen and namely can obtain 74～89 microns medicinal active powdered carbon;
(3) take by weighing 10X type molecular sieve 90g, the particle diameter of described 10X type molecular sieve is 44～74 microns, utilizes 200 orders and 325 purpose sieves to screen the 10X type molecular sieve that namely can obtain 44～74 microns;
(4) take by weighing oxalic acid 100g, purity reaches more than 99.99%;
(5) above-mentioned four kinds of powder are put into the mechanical agitator stirring mixed in 8 minutes;
(6) being packed into diameter is in the 50mm tubular die, suppresses under the hydraulic pressure of 0.75MPa, and sintering is 120 minutes under 220 ℃ of temperature;
(7) naturally cool to 50 ℃ of then demouldings, namely get the tubulose filter core of many minute apertures.
The table of comparisons raw materials used among the embodiment 1～4 is as shown in table 1.
Table 1
Embodiment 5
Get the tubulose filter core 1,2,3 of the many minute apertures of embodiment 1～4 gained, 4, the liner two-layer nonwoven, the outsourcing two-layer nonwoven wraps the polypropylene porous web at skin again, the bonding upper connection end cap in filter core two ends, be positioned in stainless steel or the plastic casing, for the treatment of drinking water, after testing, this filter core is good, as shown in table 2 to the removal effect of the methyl tertiary butyl ether(MTBE) in the drinking water.The needs that are fit to very much the home terminal drinking water treatment.
Table 2 uses filter core to process the water unit of front and back: mg/L (mg/litre)
As can be seen from Table 3, the methyl tertiary butyl ether(MTBE) that utilizes filter core of the present invention to remove in the water has been obtained good effect.
In addition the water before and after processing has also been carried out the test of sundry item, test result is as shown in table 3.
Table 3 uses filter core to process the water of front and back
As can be seen from Table 3, utilize filter core of the present invention when removing methyl tertiary butyl ether(MTBE), muddy thing and bacterial micro-organism also had a good removal effect.
With respect to prior art, the invention has the advantages that the technical scheme that proposes can remove the methyl tertiary butyl ether(MTBE) in the water, clearance reaches more than 96%, thereby reach the purpose of improving water quality, and method is simple, and the raw material sources of preparation filter medium are extensive, and cost is low; In addition, in the methyl tertiary butyl ether(MTBE), also can remove muddy thing and bacterial micro-organism in the water in removing water, especially the clearance to bacterial micro-organism is also higher.
Technical scheme provided by the present invention is specially adapted to the processing of the water that polluted by methyl tertiary butyl ether(MTBE).
More than filter medium provided by the present invention and preparation method thereof and the filter core made by this filter medium are described in detail.Used specific embodiment in this specification principle of the present invention and embodiment have been set forth, for one of ordinary skill in the art, may in implementation process, will change in specific embodiments and applications according to thought of the present invention.Therefore, the content of this specification record should not be construed as limitation of the present invention.
Claims (5)
1. a preparation method who is used for the filter medium of removal water methyl tertiary butyl ether(MTBE) comprises the steps:
The raw material that a) will comprise ultra-high molecular weight polyethylene, active carbon, 10X type molecular sieve powder and gas generation agent mixes, and the weight ratio of ultra-high molecular weight polyethylene, active carbon, 10X type molecular sieve powder and gas generation agent is: 220～400:100～120:80～120:90～120; The particle diameter of described 10X type molecular sieve powder is 44～74 microns;
B) mixture of step a) gained is suppressed sintering, cooling in mould.
2. preparation method according to claim 1 is characterized in that, the weight ratio of described ultra-high molecular weight polyethylene, active carbon, 10X type molecular sieve powder and gas generation agent is: 300～320:110～120:80～90:100～110.
3. preparation method according to claim 1 and 2 is characterized in that, the particle diameter of described ultra-high molecular weight polyethylene is 89～104 microns.
4. preparation method according to claim 1 and 2 is characterized in that, described active carbon is medical activated carbon, and its particle diameter is 74～89 microns.
5. preparation method according to claim 1 and 2 is characterized in that, gas generation agent is at least a in Celogen Az, food-grade carbonic hydroammonium, the oxalic acid.
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| CN102240481B (en) * | 2011-07-14 | 2012-11-21 | 奇迪电器集团有限公司 | Filter media for removing methyl tert-butyl ether in water and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1994519A (en) * | 2006-12-27 | 2007-07-11 | 北京佳康尔水处理技术有限公司 | Filter core with molecular sieve structure and method for preparing same |
| CN1994518A (en) * | 2006-12-27 | 2007-07-11 | 北京佳康尔水处理技术有限公司 | Filter core for removing lead and mercury from drinking water and preparation method thereof |
| CN101138688A (en) * | 2007-07-12 | 2008-03-12 | 奇迪电器集团有限公司 | Filtration medium for eliminating ozone disinfection by-product in water and method of preparing the same and filter element produced by said filtration medium |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1994519A (en) * | 2006-12-27 | 2007-07-11 | 北京佳康尔水处理技术有限公司 | Filter core with molecular sieve structure and method for preparing same |
| CN1994518A (en) * | 2006-12-27 | 2007-07-11 | 北京佳康尔水处理技术有限公司 | Filter core for removing lead and mercury from drinking water and preparation method thereof |
| CN101138688A (en) * | 2007-07-12 | 2008-03-12 | 奇迪电器集团有限公司 | Filtration medium for eliminating ozone disinfection by-product in water and method of preparing the same and filter element produced by said filtration medium |
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